User Manual
Ittakes acertain
amount
of timeto
getthe
best
perlormance
out of
any
good
sailplane
with the controls
set up
in a
particular
way, let alone
when
you
constantly
make chan-
lf
you
still
have enough
height,
it is
agood
ideato checkthe
CG
posilion
right on
your
lirst test f
light. However, do
not
attempt
it ilyou
aregetting
low. lt is much better
in that case
to
land and carry out
the test during
a second
llight.
The simplest
and
quickest
method of
checking the CG
is to
investigate
the model's
recovery
lrom
an
intentional dive.
This
characteristic
is a
function of the interaction between
Centre of
Lift and Centre
of Gravity at different
speeds.
We
must
point
out,
however,lhat this
method represents a
line-
luning
procedure,
and
it willtailcompletely
if
you
have made
gross
errors
in construclion,
or
if
the average
CG
position
shown
has
not
been set
correctly.
Place lhe
model
in
a steep
dive
(around
50 degrees)
by
holding
in down-elevalor
lor two or three seconds.
Release
the stick.
lf the
model is balanced correctly,
it will recover
lrom
the
dive by
itself in a broad,
gentle
curve.
lf the
model
immediately
balloons up
when
you
release the stick, lhen
lhe
CG
is
too
far forward.
Remove nose ballast
and apply
a little down elevator
trim-
lf the
model shows
no
lendency
to
recover from the dive
at
all- the
dive
may even tend to
get
steeper
-
then
immediately
extend
the airbrakes
and
recover with
gentle
up-elevator.
The CG
is
loo
{ar aft.
Add nose ballast, and set
slight up-
elevator
trim.
ln
order
to obtain
worthwhile
resulls, changes
in nose
ballast should
be
made in incremenls ol al
least
l0
grams,
bul
not
more
lhan
40
grams.
Never attempt
lo
fly
circles
or sleep turns
on lhe landing
approach
at
low
altitude.
Exlreme angles
ol bank at
low
altitude
are a
reliable
recipe lor disaster.
The
approach
angle
can be controlled
very
precisely
by using the airbra-
kes,
and
lhey are also
a uselul aid
in aero-towing
and
aerobatic
flying.
Whenon
aero{owyou
can
trim the altitude
of the
glider
to lhat ol the
tug using the
brakes, and
in
aerobatic
llying
they
can be used to
reduce excess
speed
quickly.
lf
the
modelclimbs dangerously
high in
powerfullift,
the
brakes
will
quickly
and safely
pullthe
modeldown again.
ll
you
have set up
the ailerons
to double as
camber
changing
f laps, set
maximum flap
movement to
no more
than
about
4 mm down.
When lhe ailerons are
deflected
down
the
maximum lift of the
wing section
is increased
slightly,
at lhe
expense ol aileron
response.
Please bear
thisinmindif
you
lowerthe flaps close to the
grou
nd. Larger
llap movemenls
otfer no advantage.
With
llaps
droopedthe
model
is better able
to exploit
light lift. Allow
yourself
many
Ilights
to
explore and
master
lhe
model's llying charecterF
stics
and control
responses, until
you
are
conlident
thal
you
are
able to
gel
the best out
ol
it.
Using the
plug-in
wingtip extensions
The
wing
extensions
increase the
lift-ptoducing area
of the
wing at the cost
of a slight
increase
in
drag.
Fitting them
is
advantageous
for flying
in
thermals,
light wind conditions
and
{or distance
flights.
For tast llying
(aerobatics,
strong
winds and slope
soaring)
the extensions
should
be
removed
(both
sides!),
and
repla-
ced
with the
plug-in
wingtips.
This raises the
DG 500's
cruising
speed and
manoeuvrabillty.
The
variable
wingspan which
results trom the
plug-in
wing-
tip extensions
widens
the
model's speed
range, and lhus
the
range of conditions
in which
it
can be
flown.
This is
exactly the
same advanlage
as
it
conlers on
the
full-size.
In our experience,
il
you
lit
or
remove lhe
wing exlensions
during
a
llying
session
it
takes a
little time to
get
used
to the
new configuralion
be{ore
you
are
able to
gel
maximum
-
'
performance
again.
lt is well worthwhile laking
the trouble
to exploitthe
advantages
ollered
bythe extra
features of CG
ballast,
llaperons and
plug-in
winglip extensions.
Atter
a
period
ol experimentation
you
will
be able
to tune
your
model
accuralely
to suit
the conditions.
Please bear safely
in mind at alltimes
when
llying
your
new
model. Exercising control
over a
model aircraft calls
lor
a
high awareness
of responsibility
from the
pilot.
Never
lly in
such a
way
that
you
endanger
or annoy
people.
Please allow
yoursell
many hours ol
llying
lo
get
to
know
your
new model, and
you
will
gradually
gain
an awareness
of the
possibilities
ol
this highly
relined model.
We
guaran-
tee that
you
will experience
the true
lascination ol
flight with
this superb
glider.
At
the
slope,
in ridge lift, or
riding
the
thermals
at a
flat lield site, the
DG 500/22
ELÄw willthrill
you
with its
appearance
in
the
air, its splendid
performance,
and
its docile
handling.
We wish
you
many hours ol
pleasure
with
your
D
G 500/22
Et AN, and as
many successful
landings as
launches.
Yours
-
the
MULTIPLEX
team
MU LTIPLEX
Modelltechnik GmbH
OU